Grate-bar.



J. S. WILSON.

GRATE BAR.

APPLIATION FILED MAY 25, 1909.

Patented Apr. 12, 1910.

2 SHEETS-'SHEET l.

J.. s. WILSON.

GRATB BAR.

V1111111111111011 FILED MAY 25, 190s.

Patented Apr. 12,1910.v

2 SHEETS-SHEET 2.

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UNT OFFICE.

JAMES S. WILSON, 0F SCRANTON, PENNSYLVANIA.

GRATE-BAR.

To all whom it may concern:

Be it known that I, JAMES S. WILSON, a citizen of the United States, residing at Scranton, in the county of Lackawanna and State of Pennsylvania, have invented certain new and useful Improvements in Grate-Bars; and I do declare the following to be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in shaking and dumping grate bars.

The object of the invention is to provide a grate bar formed of a series of independent sections, and having improved means for assembling and supporting the sections.

Another object is to provide 'means for separating the sections of the bar, and holding the sections in spaced relation.

A further object is to provide the sections of the bar with flanged or ribbed upper' edges, thus reducing the percentage of air space.

With these and other objects in view, the invention consists of certain novel features of construction, combination and arrangement of parts, as will be more fully described and particularly pointed out inl the appended claims.

In the accompanying drawings: Figure l is a plan view of a grate constructed in accordance with my invention. Fig. 2, is a vertical sectional view of the same on the line 2-2 of Fig. l. Fig. 3, is a detail vertical sectional view taken on the line 3-3 of Fig. 2. Fig. 4c, is an end view of one of the grate bars. Fig. 5, is an enlarged detailed perspective view of one of the grate bar sections. Fig. 6, is a similar view looking toward the opposite side of the section. Fig. 7, is a perspective view of one of the bearing or supporting bars of the grate sections; and, Fig. 8, is a perspective view of a modified form of grate bar section.

Referring more particularly to the drawings, l denotes the ash-pit of a furnace, in which is shown a grate constructed in accordance with my invention. At the front and rear ends of the re box are arranged stationary grate bars 2, while between the bars 2, are arranged a plurality of shaking and dumping bars 3. There may be any desired number of shaking and dumping bars 3, two of which are shown in the drawings, forming a part of this application.

Specification of Letters Patent.

Application led May 25, 1909.

Patented Apr. 12, 1910. Serial No. 498,253.

The grate bars 2 and 3, are each formed of va plurality of independent sections, 4, said sections being in the form of plates, substantially triangular in shape, as shown, with the upper end of one edge thereof projecting beyond the vertical axis of the plate to a point in advance of the other edge and` adapted to engage the adjacent edge of the adjacent bar when the bar is tilted in one direction as shown in Fig. 2 to prevent the passage of coal therebetween and operable when tilted in the other direction to provide a space suihcient to permit the dumping of the contents of the grate. In the lowermost portion of each of the plates is formed an upwardly extending rectangular notch 5, and on one side of the plates, above the notch 5, is formed a laterally projecting spacing lug 6, and adjacent to one edge of the notch is formed a vertically disposed lug 7, and adj acent to the opposite edge of the notch is formed a similar lug 8, said lug 8, being of greater length than the lug 7. On the opposite side of the plate or section, adjacent to one edge of the notch 5, are formed parallel lugs 9, which are spaced apart to form a groove l0, which, when the sections are assembled, is adapted` to receive the lug 8, of the next adjacent plate or section. On the side of the plates or sections having the lugs 6, 7, and 8, and adjacent to the upper edge of the plates are formed laterally projecting spacing lugs l1, while on the opposite side of the plate, above the lugs 9, and in line therewith, is a pair of lugs 12, which are spaced apart' to form a groove 13, which, when the sections are assembled, is adapted to receive one of the lugs ll, of the next adjacent plate. By means of the lugs on the opposite sides of the sections, the latter will be held apart to provide spaces between the same for the circulation of air. These lugs may be of greater or less width, thus providin a larger or smaller air space between the p ates or sections. The parallel lugs onthe one side of the sections which provide grooves for the lugs on the opposite sides of the next adjacent plates serve to lhold the sections against lateral or rocking movement, when the sections areclamped together in the manner hereinafter described. In the preferred form of bar, the sections are provided on their upper edges with laterally projecting flanges or ribs 14., which may be of any desired width, and are rovided to reduce the upper portions of the air spaces 55 ed., and said threaded ends project into Vthe bar 24, and said supporting bar 27 is also straddled by the notchedlower ends of the intermediate sections of the grate bar. The supporting bar 27, is preferably slightly tapered toward its upper' edge and is provided 70 on one side with upper and lower radially projecting loi'lgitudinal spacing ribs 28, and

on its opposite side with a similar rib 29, which is preferably arranged at a point mid way between the ribs 28 on the opposite side 75 of the bar. The ribs 28 and 29 space the sides of the bar 27, from the adjacent edges of the notches and slots in the sections, and thus permit a free circulation of air around the bar, which prevents thelatter from be- 80 coming so hot as to warp out ofshape. The ends of the bar 27, enga-ge and rest in thelower portions of the slots 16, in the end sections of the grate bars and provide an additional support for the sections of the bar and g a bearing for the clamping-bar 24, along its entire length. The bearing bar 27, also acts as a wedgevto bind the sections or plates of the bars together;

It will be noted that the lugs on one side 90 of the sections of the grate bla-r andv the grooves which are engaged thereby on the opposite sides of the adjacent sections are vertically disposed and are parallel with the notches in the lower portions of the sections 95 so that by loosening the clamping nuts atl either end of the clamping bars-24, a brokenor worn out section may be readily removed from the bar and a new one dropped in its place without-disconnecting any of its parts 100 or without disturbing any ofits sections.

The stationary grate bars at the front and rear ends of the ashpit are constructed in a similar manner to the rocking bars and said stationary bars are secured to the opposite 105 sides ofthe ash-pit in any suitable manner.

By providing the sections of the grate bars with the laterally projectinglugs and arranging said lugs,- as herei-n shown and described, the space betweenuthe sections is 110 divided by the lugs into a series of spaces, or in. other words, the sections engage each other at more than `one point and thus re* duce the liability ofthe lateralwarpin of the sections. The arrangement of the lugs on the upper portions ofthe sections also prevents the scraper from droppingy be-V tween the sections when cleaning' the fire and thus breaking the sections.

It will be. noted that the grooves and lugs 120 which engage the same on the opposite sides of the sections are so near the vertical line of the notches in the lower ends 4of thesections which engage the clamping and supporting bars that the expansion and; con- 125 traction of the sectionsv will .notappreciably affect the same, owing to thisslight distance between these poi-nts sectionswill notgbind laterallyy a suiiicientiextentr to interferewith the removal or replacingofthe sections. Itf 130 between the sections or plates of the bar, thus permitting the use of ne coal, and also reducing the air space, where a forced draft is used in connection with the furnace. The 5 end sections 15, of the bars are of similar shape to the intermediate sections, and are provided on one side only with the spacing lugs to engage the adjacent sections or to provide grooves to receive the lugs of the lo adjacent sections. The end sections are provided with slots 16,` which coincide with the notches 5, of the intermediate sections, and the outer sides of the sections 15, at the upper ends of the slots 16, are provided with l5 countersinks or recesses 17, the purpose of which will hereinafter appear. On the outer sides of the end sections 15, of the rocking bars of the grate are formed laterally projecting trunnions 18, which are adapted to operatively engage bearing apertures formed in suitable supporting bars arranged on the opposite sides of the fire box. The sections 15, at one end of the rocking bars of the grate are extended downwardly, as shown at 19, and are provided on their inner faces with laterally projecting studs 20, with which are loosely engaged a connecting bar 21, whereby. said rocking bars are connected together' to move in unison.

Connected to the stud 20, of the first rocking grate bar is an operating bar 22, which extends through a suitable opening in front of the furnace, whereby the outer end of the same may be grasped and the pivoted or rocking bars of the grate may be oscillated to a greater or less degree to agitate or dump the fire. The connecting4 bar and operating bar are held in position. on the studs 20, preferably by means. of retaining disks 23,

which are eccentrically pivoted on the ends of the studs, so that after the connecting bar and the operating' bar are engaged with the latter, the disks will drop down out of alinement with the ends of the studs and the engaging apertures in the bars, and thus preventing the latter from becoming disengaged from the studs. The sections of the bars are assembled upon a rectangular wrought iron clamping bar 24, which is inserted through the. slots 16, in the end sections, and is straddled by the notched lower ends of the intermediate sections, which are dropped down into engagement therewith. The opposite ends of the bar 24, are threadcountersunkor recessed end portions of the end sections 15, and on said projecting ends are arranged washers 25, and clamping nuts 26, whereby the sections of the bars are clamped together and held in operative position.

In addition to the clamping bar 24, I-preferably employl a bearing or supporting bar 27, which is also inserted through the slots g5 16, in the end sections beneath the, clamping will also be noted that owing to the shape of the front and rear edges of the assembled bars they may be shaken or oscillated by pulling the operating bar outwardly or forwardly and the fire agitated to permit the air to pass more freely therethrough with but slight loss of ashes and no possible loss of fire or coal; while by pushing the operating rod in, the grate bars may be rocked to a position to permit the ashes to be dumped between the same into the ash pit. When the grate bars are in their normal position, the top edges of the sections form a flat level surface over which the ashes and clinlrers may be drawn through the ire doors of the furnace if desired, and to facilitate the movement of the firing tool over this surface and to prevent the same from catching in between the edges of the bars, said edges or upper corners of the sections forming same are slightly rounded or beveled.

From the foregoing description, taken in connection with the accompanying drawings, the construction and operation of the invention will be readily understood without requiring a more extended explanation:

Various changes in the form, proportion and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention defined in the appended claims.

Having thus I claim is:

l. A grate bar comprising a series of spaced sections provided on their lower ends with alined notches, a bearing bar arranged in said notches and a clamping or locking bar arranged in said notches above said bearing bar.

2. A grate bar comprising a series of sections each provided in its lower end with an angular notch, a locking bar angular in cross section arranged in said notches to lock said sections together, and a bearing bar arranged in said notches below said clamping bar.

3. A grate bar comprising a series of sections each provided in its lower end with an angular notch a locking bar angular in cross section arranged in said notches to lock said sections together, a bearing bar arranged in said notches and having transversely spaced longitudinally extending ribs on one face thereof and a longitudinally extending rib described my invention, what on the opposite face thereof arranged midway between and parallel with the ribs on the other face.

4L. A grate bar formed of a plurality of independent sections, each of which is provided in its lower end with a notch, a series of spacing lugs arranged on one side of said sections, parallel groove forming lugs on the opposite sides of said sections, said grooves and lugs being arranged in parallel relation with the notches in said sections, a clamping bar adapted to be engaged by the notched lower ends of said sections, clamping nuts on the ends of said bar to clamp said sections together in operative position, and a supporting bar arranged in the notched lower portions of said sections below said clamping bar and in engagement therewith.

5. A grate bar formed of a plurality of independent sections, each of which is provided in its lower end with a notch, a series of spacing lugs arranged on one side of said sections, parallel groove forming lugs on the opposite sides of said sections, said grooves and lugs being arranged in parallel relation with the notches insaid sections, a clamping bar adapted to be engaged by the notched lower ends of said sections, clamping nuts on the ends of said bar to clamp said sections together in operative position, and a supporting bar arranged in the notched lower portions of said sections below said clamping bar and in engagement therewith, said supporting bar having on its opposite sides longitudinal spacing ribs to engage the opposite side walls o-f the notches in said sections, whereby a space is formed between the supporting bar and the walls of the l notches.

6.' A grate bar comprising a series of spaced sections provided in their lower ends with alined notches, a tapered bearing bar arranged in said notches, spacing ribs on the opposite sides of said bar, adapted to engage the opposite walls of the notches in said sections, thereby serving to wedge or bind said sections together, and a clamping bar arranged in said notches above said bearing bar.

In testimony whereof I have hereunto set my hand in presence of two subscribing witi nesses.

JAMES S. WILSON. Witnesses:

A. Gr. CURTIN, Evan HOPKINS. 

